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Test your basic knowledge |
Dairy Cattle And Reproduction
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Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Implies the amount of estrogen production
cow ovulation
Avg. bull specs
femininity of a heifer
ewe estrus cycle
2. What makes the milk flow through the mammary glands?
leydid or interstitial cells
Blood
Follical Stimulating in females
~1 month
3. 24 hours before end of estrus cycle
mare ovulation
Blood
cervix
reason for seasonal breeding periods
4. 147 days
growth lost from castration methods (knife & band)
cow gestation
functions of progestrone
ewe gestation
5. Knife-loose ~1wk of growth. band-loose ~2wks of growth.
Jersey Cow
monorchid
growth lost from castration methods (knife & band)
oviducts
6. Milk ~305 days - dry 60 days prior to calving
Dairy Cattle milking schedule
sow estrus cycle
ewe estrus
femininity of a heifer
7. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
penis and prepuce observation (BSE)
Bull's fibro-elastic penis
dartos muscle
organs used in spermatogenesis
8. Sperm production
spermatogenesis
elastrator
organs used in spermatogenesis
growth lost from castration methods (knife & band)
9. Superior genes are _______ to multiply
ewe ovulation
Hard
Lutinizing Hormone in males
cowper's gland
10. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
ewe estrus cycle
visual evaluation (BSE)
elastrator
van deferens
11. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
effects of estrogen
Where livelihood is in agriculture
colostrum
sow gestation
12. 30 hours after estrus begins
reasons for castration
cow ovulation
cremaster muscle
estrous
13. Contains and regulates the temp of the testes for sperm production
scrotum
Jersey Cow
Sperm survival specs
Lutinizing Hormone in females
14. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed
Brown Swiss Cow
humans: stress level vs sperm
mare estrus
Avg. bull specs
15. Animal which has been castrated after puberty
prostate gland
stag
Culls bulls earlier (2 reasons)
mare estrus
16. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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17. Sperm is produced here
seminiferous tubules
urethra
cow estrus
cervix
18. Contains and regulates the temp of the testes for sperm production
scrotal circumference (BSE)
vagina
scrotum
cow estrus cycle
19. When are steers and heifers weaned from bottle feeding?
6-8 weeks
sow estrus
butterfat
scrotum
20. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm
burdizzo
Brown Swiss Cow
scrotal circumference (BSE)
libido test (BSE)
21. (male) pushes the testes upward toward the body for warmth or protection
dartos muscle
effects of BST
purpose of Breeding Soundness Exam (BSE) for males
Hard
22. FEED
mare estrus cycle
seasonally polyestrous
#1 cost in production
testis (gonads)
23. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
cow estrus cycle
Blood
effects of estrogen
what has to happen for males for copulation to occur
24. (switzerland) 2nd in size and milk production - most muscle -
Brown Swiss Cow
visual evaluation (BSE)
ewe estrus cycle
eminal vesicles
25. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.
retractor muscles
feeding a high producing dairy cow
castration
Holstein Cow
26. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
Jersey Cow
sigmoid flexure
effects of estrogen
vulva
27. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days
Jersey Cow
elastrator
epididymis: definition - 3 parts - 4 functions
Dairy calves are removed from cow at birth to...
28. Scar tissue plugs up chambers of udder
hypothalamus and pituitary gland
testis (gonads)
age and castration
mastitis
29. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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30. The more stressed out the male is - the less sperm he is going to produce
seasonally polyestrous
humans: stress level vs sperm
monorchid
sow estrus cycle
31. 283 days
Reasons for gestation length being affected
4 major reasons for culling dairy cows
cow gestation
cow ovulation
32. 265-285 days
vagina
things to check for in a breeding soundness exam (BSE)
Dairy Cattle Gestation
mare estrus cycle
33. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
van deferens
purpose of Breeding Soundness Exam (BSE) for males
ewe gestation
age and castration
34. (LH) stimulates the Leydig cells to produce testosterone
rectal palpation (BSE)
Lutinizing Hormone in males
sperm cell
Holstein Cow
35. 2 month growth cycle. stored in the epididymis of the bull
spermatogenesis
Sperm growth rate
rectal palpation (BSE)
purpose of Breeding Soundness Exam (BSE) for males
36. 19-23 (21) days
penis and prepuce observation (BSE)
ewe gestation
cow estrus cycle
epididymis: definition - 3 parts - 4 functions
37. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
humans: stress level vs sperm
sow ovulation
penis proper
accessory sex glands
38. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.
penis sizes vs delivering methods
cow estrus
epididymis: definition - 3 parts - 4 functions
penis and prepuce observation (BSE)
39. FEED
dairy cattle pregnancy check
#1 cost in production
penis sizes vs delivering methods
sow estrus
40. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
things to check for in a breeding soundness exam (BSE)
dry-off time in dairy cattle
penis proper
mare's estrous cycle
41. To remove/separate testicles from animal's body before animal reaches puberty
femininity of a heifer
castration
pelvis
things to check for in a breeding soundness exam (BSE)
42. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
Dairy Cattle Lactation (standard)
normal presentation of the fetus
Holstein Cow
accessory sex glands
43. Can survive ~7 days in cow. vast majority <48 hours
sigmoid flexure
Sperm survival specs
cremaster muscle
growth lost from castration methods (knife & band)
44. Why Dairy calves are fed powdered milk.
retractor muscles
femininity of a heifer
what has to happen for males for copulation to occur
1. more cost effective - 2. powdered milk is in excess production
45. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
dairy cattle pregnancy check
reason for seasonal breeding periods
cremaster muscle
Avg. bull specs
46. Days which have increasing daylight hours
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47. 1-2 days
ewe estrus
Lutinizing Hormone in males
pelvis
epididymis: definition - 3 parts - 4 functions
48. Provide nourishment for the developing sperm
van deferens
4 major reasons for culling dairy cows
uterus
sertoli cells
49. Days which have decreasing daylight hours
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50. 19-23 (21) days
sow estrus cycle
prostaglandin
ewe's estrous cycle
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